2-PCCA hydrochloride, a racemate, is a potent and selective GPR88 receptor agonist showing inhibition of GPR88-mediated cAMP production in HEK293 cells with an EC50 value of 116 nM.

Bithionol (Actamer), formerly marketed as an active ingredient in various topical drug products, was shown to be a potent photosensitizer with the potential to cause serious skin disorders. Approvals of the NDA's for bithionol drug products were withdrawn on October 24, 1967.

I942 is a novel, selective ACyclic nucleotide (NCN) EPAC1 agonist that activates exchange proteins to regulate inflammatory gene expression in human umbilical blood tubes and inhibit pro-inflammatory cytokine signaling associated with cardiovascular disease.

Torbafylline, a xanthine derivative, is a phosphodiesterase (PDE) inhibitor that attenuates burn-induced protein hydrolysis in rat skeletal muscle through activation of the PDE4/cAMP/EPAC/PI3K/Akt pathway, and inhibits the enhanced ubiquitin-proteasome-dependent protein hydrolysis in skeletal muscle of cancer- and sepsis-prone rats.

HJC0197 selectively blocks cAMP-induced Epac activation. HJC0197 is an effective exchange protein. Which straightly activated by cAMP (Epac) antagonist (IC50=5.9 μM for Epac2).